Two collocated QuantAQ MODULAIR air quality monitoring sensors were installed at a monitoring site in East Hartford, Connecticut to evaluate its performance tracking gas, particulate and meteorology data over a year long time frame. Hourly data for O3, NO2, PM2.5, PM10, temperature and relative humidity were compared to reference monitors located at the same site. The full downloadable dataset used is located here Download CSV.

Sensor Details

QuantAQ Specifications

Possible Configuration Evaluated Configuration Cost Data Access Power Supply Considerations Reference Monitors Compared
Particulates: PM1, PM2.5, PM10
Gases: NO, NO2, O3, CO
Meteorology: WS/WD, Temp, RH 		Particulates: PM2.5, PM10
Gases: O3, NO2
Meteorology: Temp, RH 		Sensor: $4,500.00
Sonic Anemometer: $950.00
Solar Power System: $495.00
Cloud Service: $500.00 per device & year 		Web Interface, API, SD Card Standard 5V, 2A USB-C connection (connect to solar or battery) Time Resolution: 5 minute to 1 hour intervals
Dimensions: 11.04” x 9.04” x 5.72”
Weight: 2.72 kg 		O3: Teledyne N400
NO2: Teledyne T500U
PM2.5 & PM10: Teledyne API T640X
Temp & RH: Climatronix & Vaisala via AutoMet 580

Setup

Timeseries Comparison

QuantAQ hourly data for O3, NO2, PM2.5, PM10, temperature and relative humidity were compared by quarter to reference values (Q1: January-March, Q2: April-June, Q3: July-September, Q4: October-December).

O3

Quarter 3 (2023)

Quarter 4 (2023)

Quarter 1 (2024)

Quarter 2 (2024)

NO2

Quarter 3 (2023)

Quarter 4 (2023)

Quarter 1 (2024)

Quarter 2 (2024)

PM2.5

Quarter 3 (2023)

Quarter 4 (2023)

Quarter 1 (2024)

Quarter 2 (2024)

PM10

Quarter 3 (2023)

Quarter 4 (2023)

Quarter 1 (2024)

Quarter 2 (2024)

Temperature

Quarter 3 (2023)

Quarter 4 (2023)

Quarter 1 (2024)

Quarter 2 (2024)

Relative Humidity

Quarter 3 (2023)

Quarter 4 (2023)

Quarter 1 (2024)

Quarter 2 (2024)


Correlation Comparison

QuantAQ MOD-00414 and Reference

O3

NO2

PM2.5

PM10

Temperature

Relative Humidity

QuantAQ MOD-00415 and Reference

O3

NO2

PM2.5

PM10

Temperature

Relative Humidity

QuantAQ MOD-00414 and MOD-00415

O3

NO2

PM2.5

PM10

Temperature

Relative Humidity

Results Summary

*Outliers were defined from the QuantAQ dataset using the IQR Method (all data points more than 1.5 below the the lower bound quartile or above the upper bound quartile).

Contact Information

Questions on Connecticut community based monitoring:
Questions on creating this report: